Albert f



July 31, 1923. 1,463,587

A. F. KRAUSE BQILER TUBE CLEANER Filed March 18. 1921 Patented July 31, 1923.

UNITED STATES PATENT OFFICE.

ALBERT F. KRAUSE, OF BUFFALO, NEVI YORK, ASSIGNOR TO GENERAL SPECIALTY Y COMPANY OF BUFFALO, NEW YORK, A COPARENERSHIP.

' BoILER-TUBE CLEANER.

Application inea March 18,1921. seriai No. 453,311.

To all whom` t may concern.'

Beit known that I, ALBERT F. KRAUsn, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Boiler-rinse Cleaners, oi which the following is a specification.

This invention relates to the rotary cleaners which. are employed for removing scale lfrom thetubes of water-tube boilers, andV more particularly to the type comprising a rotary head and arms or members loosely connected to the head and carryingtoothed cutters which are thrown out againstV the scale by centrifugalV force.. V

The effectiveness of this class of cleaners depends von the speed of rotation of the cutter head, the blow delivered by the toothed cutters being more powerful the greater the velocity of the head.

The arrangement of the cutter-carrying members hashitherto been such as to counteract the driving force of the cutter head to a considerable extent, thus retardingits speed and reducing the efficiency of the tool.

It is the object of my invention to improve the construction of this type of Vclean- A ers with a view of reducing such retarding or counteractive force to a minimum and 4increasing the effectiveness of the tool.

In the accompanyingdrawings: Figure 1 is a side elevation lof the tool.` Figures 2 and 3 are transverse sections on the corre-l the cutter-carrying arms'with. the rotary Vthe drawings comprising Y.front and rear plates 1, 2 anda pair of longitudinal tiel bolts 3 rigidly connecting the same andarranged on opposite sidesiof the axis of the head. On its rearside the inner plate is provided with a screw socket l adapted to ings. A turbine motor is preferred for this Y l the head, but a different number may be employed, if desired. These cutters have the usual longitudinal teeth 6a and are composed of a number of sections arranged side by'side, as shown. The sections of each cutter are mounted to rotate on a shaft or spindie 7 arranged lengthwise of the head and secured in the front ends of a pair of parallel.y bars;l or carrying-arins 8 arranged to swing crosswse of the head. These carrying arms or members are loosely linked to the head in such manner that the cutters are caused to yield or rebound from projections of the scale in a substantially straight line located between two lines, one drawn radially through the axes of the cutter and the head and the other through the cutter tangentially to the circle of rotation of the axis of the cutterabout the aXis of said head.

As the linked connectionsY of the two sets ofcarrying arms are alike, a description of one set will apply to both. The arms of each set are pivoted upon a longitudinal rod 9 journaled in openings 9a in the outer ends of a pair of parallel links 10 which are in turn pivoted upon the adjacent tie bolt 3. These links are rigidly tied together by a longitudinal web or bar 11 which is concaved or grooved on Vits inner side, as shown at 12, to receivethe adjacent sides of the rod 9 and tic bolt 3. Located between the cutter shaft 7 and the rod 9 is a similar pair of links 13 provided at their inner ends with trunnions 14 journaled in the front and -of the carrying arms, while the outer ends rear plates 1'and 2, and, rigidly united by ofthe pins are overlapped by the plates 1 and2, Ywhereby the against displacement. l

"As shown in Figs. e and 6, the webs 11 are provided next to the links 10 with repins are reliably heldl arms S. h

lt will be understood from the foregoing n c cesses, 111L to receive the inner ends of the Y receive the vfront end of a shaft 5 which is' `driven by a motor, not shown in the draw- Y ber connecting said plates, a pair of links mounted on said tie member to swing cross- Wise of said head, a Web connecting said links, a second pair of links pivoted to said plates and arranged parallel with the firstnamed links, front and rear arms pivoted to the free ends of the corresponding pairs of links, and cutters carried by said arms.

8. The combination of a rotatable head,

comprising front and rear plates, a tie-member connecting said plates, a pair of links mounted on said tie member to swing cross- Wise of said head, a second pair of links pivoted to said plates and arranged parallel with the first-named links, a longitudinal .including front and rear plates, a cuttershaft, arms carrying opposite ends of said shaft, links pivotally mounted on said plates to swing orossWise of said head, and pivotpins connecting said arms With the free ends of said links, said plates overlapping the outer ends of said pins and each pin having a shoulder which bears against the. outer `side of the adjacent carrying arm.

ALBERT F. KRAUSE. 

